My expertise is the development, to prove existence and the computation of equilibria in economic and game theoretic models. In particular models in economics, including auctions, are studied with indivisible commodities like houses, cars, computers, that can not be divided in arbitrary amounts. The existence of equilibria in such models is mathematically very complicated. Further new solution concepts ate developed for cooperative games in which the possibilities for players to cooperate are limited and refinements of existing solution concepts for noncooperative games are proposed. These problems can be very often described as a system of equations, of which the solution is the required solution concept.

Primary Research Focus:

Game theory, discrete optimization, fixed point theory, general equilibrium theory

JEL Areas:C7 : Game Theory and Bargaining Theory:GeneralD5 : General Equilibrium and Disequilibrium: General